Question

Find ratio between total surface area of cylinder to curved surface area of cylinder. Give that its height and radius are 7.5cm and 3.5cm.​

Answer 1

Step-by-step explanation:

TSA = 2πr (h +r)

CSA = 2πrh

Answer 2

Answer:

ratio of TSA ANS CSA= 121:45.1

Step-by-step explanation:

TSA=2πr(h+r)

=2×22/7×3.5(7.5+3.5)

=2×22/7×3.5(11)

=22/7×77

=22×11

=242cm^2

(l)2=(r)2+(h)2

(l)2= (3.5)^2+(7.5)^2

(l)^2= 12.25+56.25

l= √68.5

l= 8.2 cm

CSA=πrl

=22/7×3.5×8.2

=11×8.2

CSA= 90.2

ratios are,

TSA:CSA

242:90.2

121:45.1